Re: Question about light and heat

[Joe Heafner <heafnerj@VNET.NET>]

> From: Tina Fanetti <FanettT@QUEST.WITCC.CC.IA.US>
>
> She asked if light and heat were the same thing since they were both energy.  Light energy would be like a photon and heat is internal energy.
"Heat" is but one of several *processes* by which energy is transferred into or out of a system. Other processes are work and radiation.

Unfortunately, the terms *heat* and *radiation* are incorrectly used as synonyms for *energy*.

"Light" is energy carried by electromagnetic waves.


Cheers,
Joe Heafner - Instructional Astronomy and Physics
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